Mercedes S-Class W222 3.0L V6 Diesel EGR Cooler Leak: MOT Failure Risk in 2026
Owning a Mercedes-Benz S-Class W222 is often seen as the pinnacle of automotive luxury, combining supreme comfort with advanced engineering. However, beneath the polished exterior of the S350 BlueTEC lies a potential vulnerability that could ground your vehicle in 2025: the 3.0L V6 diesel EGR cooler leak. As UK emissions regulations tighten and MOT testing […]